hadoop

Top Performance Problems discussed at the Hadoop and Cassandra Summits

In the last couple of weeks my colleagues and I attended the Hadoop and Cassandra Summits in the San Francisco Bay Area. It was rewarding to talk to so many experienced Big Data technologists in such a short time frame – thanks to our partners DataStax and Hortonworks for hosting these great events! It was also great to see that performance is becoming an important topic in the community at … read more

Speeding up a Pig+HBase MapReduce job by a factor of 15

The other day I ran a Pig script. Nothing fancy; I loaded some data into HBase and then ran a second Pig job to do some aggregations. I knew the data loading would take some time as it was multiple GB of data, but I expected the second aggregation job to run much faster. It ran for over 15 hours and was not done at that time. This was too … read more